var more = document.querySelector(' #more');

var homeNav = document.querySelector('.homeNav');
var lis=document.querySelectorAll(".homeNav li")
var shangjiantou = document.querySelector('.more .icon-shangjiantou')
var xiajiantou = document.querySelector('.more .icon-xiajiantou')
var secondMenu=document.querySelector('.secondMenu')
more.onmouseover = function () {
    secondMenu.style.display = "block";
    xiajiantou.style.display = "none";
    shangjiantou.style.display = 'block';
    console.log("移入了")
}
more.onmouseout = function () {
    secondMenu.style.display = "none";
    xiajiantou.style.display = "block";
    shangjiantou.style.display = 'none';
    console.log('移出了')
}
more.onclick = function () {
console.log(productCenter)
    console.log('点击了')
}